Does it actually lead to energy savings? According to science writer Joseph Stromberg, the presumed electricity conservation from the time change is unclear or nonexistent.

What would happen if daylight saving time were abolished? Or if it were extended forever? The length of light we experience each day wouldn’t actually change; that’s determined by the tilt of Earth’s axis. But we would experience it in times more accommodating for our modern world.

Is daylight saving time dangerous? A bit. When we shift clocks forward one hour in the spring, many of us will lose that hour of sleep.